Infrared (IR) sensors are a type of sensor that are used in drones to detect and measure the intensity of infrared radiation, which is electromagnetic radiation with a wavelength that is longer than that of visible light. IR sensors can be used in drones for a variety of purposes, including temperature sensing, night vision, and detection of objects or materials that are invisible to the human eye.

There are several different types of IR sensors that can be used in drones, including passive IR sensors, active IR sensors, and thermal IR sensors. Passive IR sensors detect the IR radiation that is naturally emitted by objects or materials, while active IR sensors emit their own IR radiation and detect the reflection off of objects or materials. Thermal IR sensors detect the temperature of an object or material by measuring the IR radiation that is emitted by the object or material.

IR sensors are often used in drones for thermal imaging, which involves using a thermal IR sensor to capture images or data about the temperature of an area or object. These images or data can be used to identify temperature abnormalities or hotspots that may indicate issues or problems, such as overheating machinery or electrical components, or fires.

Overall, IR sensors are a valuable tool for drones, as they allow for the detection and measurement of infrared radiation, which can be useful for a variety of applications, including temperature sensing, night vision, and detection of objects or materials that are invisible to the human eye.